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-rw-r--r--deps/imgui/src/imgui_impl_opengl3.cpp165
1 files changed, 109 insertions, 56 deletions
diff --git a/deps/imgui/src/imgui_impl_opengl3.cpp b/deps/imgui/src/imgui_impl_opengl3.cpp
index 7d0b536..40b3be6 100644
--- a/deps/imgui/src/imgui_impl_opengl3.cpp
+++ b/deps/imgui/src/imgui_impl_opengl3.cpp
@@ -4,8 +4,9 @@
// This needs to be used along with a Platform Backend (e.g. GLFW, SDL, Win32, custom..)
// Implemented features:
-// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID!
+// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture as texture identifier. Read the FAQ about ImTextureID/ImTextureRef!
// [x] Renderer: Large meshes support (64k+ vertices) even with 16-bit indices (ImGuiBackendFlags_RendererHasVtxOffset) [Desktop OpenGL only!]
+// [X] Renderer: Texture updates support for dynamic font atlas (ImGuiBackendFlags_RendererHasTextures).
// About WebGL/ES:
// - You need to '#define IMGUI_IMPL_OPENGL_ES2' or '#define IMGUI_IMPL_OPENGL_ES3' to use WebGL or OpenGL ES.
@@ -22,6 +23,8 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
+// 2025-06-11: OpenGL: Added support for ImGuiBackendFlags_RendererHasTextures, for dynamic font atlas. Removed ImGui_ImplOpenGL3_CreateFontsTexture() and ImGui_ImplOpenGL3_DestroyFontsTexture().
+// 2025-06-04: OpenGL: Made GLES 3.20 contexts not access GL_CONTEXT_PROFILE_MASK nor GL_PRIMITIVE_RESTART. (#8664)
// 2025-02-18: OpenGL: Lazily reinitialize embedded GL loader for when calling backend from e.g. other DLL boundaries. (#8406)
// 2024-10-07: OpenGL: Changed default texture sampler to Clamp instead of Repeat/Wrap.
// 2024-06-28: OpenGL: ImGui_ImplOpenGL3_NewFrame() recreates font texture if it has been destroyed by ImGui_ImplOpenGL3_DestroyFontsTexture(). (#7748)
@@ -230,7 +233,7 @@ struct ImGui_ImplOpenGL3_Data
bool GlProfileIsES3;
bool GlProfileIsCompat;
GLint GlProfileMask;
- GLuint FontTexture;
+ GLint MaxTextureSize;
GLuint ShaderHandle;
GLint AttribLocationTex; // Uniforms location
GLint AttribLocationProjMtx;
@@ -243,6 +246,7 @@ struct ImGui_ImplOpenGL3_Data
bool HasPolygonMode;
bool HasClipOrigin;
bool UseBufferSubData;
+ ImVector<char> TempBuffer;
ImGui_ImplOpenGL3_Data() { memset((void*)this, 0, sizeof(*this)); }
};
@@ -325,11 +329,7 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
if (major == 0 && minor == 0)
sscanf(gl_version_str, "%d.%d", &major, &minor); // Query GL_VERSION in desktop GL 2.x, the string will start with "<major>.<minor>"
bd->GlVersion = (GLuint)(major * 100 + minor * 10);
-#if defined(GL_CONTEXT_PROFILE_MASK)
- if (bd->GlVersion >= 320)
- glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &bd->GlProfileMask);
- bd->GlProfileIsCompat = (bd->GlProfileMask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT) != 0;
-#endif
+ glGetIntegerv(GL_MAX_TEXTURE_SIZE, &bd->MaxTextureSize);
#if defined(IMGUI_IMPL_OPENGL_ES3)
bd->GlProfileIsES3 = true;
@@ -338,6 +338,12 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
bd->GlProfileIsES3 = true;
#endif
+#if defined(GL_CONTEXT_PROFILE_MASK)
+ if (!bd->GlProfileIsES3 && bd->GlVersion >= 320)
+ glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &bd->GlProfileMask);
+ bd->GlProfileIsCompat = (bd->GlProfileMask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT) != 0;
+#endif
+
bd->UseBufferSubData = false;
/*
// Query vendor to enable glBufferSubData kludge
@@ -357,6 +363,10 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
if (bd->GlVersion >= 320)
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
#endif
+ io.BackendFlags |= ImGuiBackendFlags_RendererHasTextures; // We can honor ImGuiPlatformIO::Textures[] requests during render.
+
+ ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
+ platform_io.Renderer_TextureMaxWidth = platform_io.Renderer_TextureMaxHeight = (int)bd->MaxTextureSize;
// Store GLSL version string so we can refer to it later in case we recreate shaders.
// Note: GLSL version is NOT the same as GL version. Leave this to nullptr if unsure.
@@ -409,7 +419,7 @@ void ImGui_ImplOpenGL3_Shutdown()
ImGui_ImplOpenGL3_DestroyDeviceObjects();
io.BackendRendererName = nullptr;
io.BackendRendererUserData = nullptr;
- io.BackendFlags &= ~ImGuiBackendFlags_RendererHasVtxOffset;
+ io.BackendFlags &= ~(ImGuiBackendFlags_RendererHasVtxOffset | ImGuiBackendFlags_RendererHasTextures);
IM_DELETE(bd);
}
@@ -421,9 +431,8 @@ void ImGui_ImplOpenGL3_NewFrame()
ImGui_ImplOpenGL3_InitLoader(); // Lazily init loader if not already done for e.g. DLL boundaries.
if (!bd->ShaderHandle)
- ImGui_ImplOpenGL3_CreateDeviceObjects();
- if (!bd->FontTexture)
- ImGui_ImplOpenGL3_CreateFontsTexture();
+ if (!ImGui_ImplOpenGL3_CreateDeviceObjects())
+ IM_ASSERT(0 && "ImGui_ImplOpenGL3_CreateDeviceObjects() failed!");
}
static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height, GLuint vertex_array_object)
@@ -439,7 +448,7 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid
glDisable(GL_STENCIL_TEST);
glEnable(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
- if (bd->GlVersion >= 310)
+ if (!bd->GlProfileIsES3 && bd->GlVersion >= 310)
glDisable(GL_PRIMITIVE_RESTART);
#endif
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
@@ -515,6 +524,13 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
+ // Catch up with texture updates. Most of the times, the list will have 1 element with an OK status, aka nothing to do.
+ // (This almost always points to ImGui::GetPlatformIO().Textures[] but is part of ImDrawData to allow overriding or disabling texture updates).
+ if (draw_data->Textures != nullptr)
+ for (ImTextureData* tex : *draw_data->Textures)
+ if (tex->Status != ImTextureStatus_OK)
+ ImGui_ImplOpenGL3_UpdateTexture(tex);
+
// Backup GL state
GLenum last_active_texture; glGetIntegerv(GL_ACTIVE_TEXTURE, (GLint*)&last_active_texture);
glActiveTexture(GL_TEXTURE0);
@@ -551,7 +567,7 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
GLboolean last_enable_stencil_test = glIsEnabled(GL_STENCIL_TEST);
GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
- GLboolean last_enable_primitive_restart = (bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
+ GLboolean last_enable_primitive_restart = (!bd->GlProfileIsES3 && bd->GlVersion >= 310) ? glIsEnabled(GL_PRIMITIVE_RESTART) : GL_FALSE;
#endif
// Setup desired GL state
@@ -670,7 +686,7 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
if (last_enable_stencil_test) glEnable(GL_STENCIL_TEST); else glDisable(GL_STENCIL_TEST);
if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_PRIMITIVE_RESTART
- if (bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
+ if (!bd->GlProfileIsES3 && bd->GlVersion >= 310) { if (last_enable_primitive_restart) glEnable(GL_PRIMITIVE_RESTART); else glDisable(GL_PRIMITIVE_RESTART); }
#endif
#ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_POLYGON_MODE
@@ -683,50 +699,82 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
(void)bd; // Not all compilation paths use this
}
-bool ImGui_ImplOpenGL3_CreateFontsTexture()
+static void ImGui_ImplOpenGL3_DestroyTexture(ImTextureData* tex)
{
- ImGuiIO& io = ImGui::GetIO();
- ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
+ GLuint gl_tex_id = (GLuint)(intptr_t)tex->TexID;
+ glDeleteTextures(1, &gl_tex_id);
- // Build texture atlas
- unsigned char* pixels;
- int width, height;
- io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height); // Load as RGBA 32-bit (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
-
- // Upload texture to graphics system
- // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
- GLint last_texture;
- GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
- GL_CALL(glGenTextures(1, &bd->FontTexture));
- GL_CALL(glBindTexture(GL_TEXTURE_2D, bd->FontTexture));
- GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
- GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
- GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
- GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
+ // Clear identifiers and mark as destroyed (in order to allow e.g. calling InvalidateDeviceObjects while running)
+ tex->SetTexID(ImTextureID_Invalid);
+ tex->SetStatus(ImTextureStatus_Destroyed);
+}
+
+void ImGui_ImplOpenGL3_UpdateTexture(ImTextureData* tex)
+{
+ if (tex->Status == ImTextureStatus_WantCreate)
+ {
+ // Create and upload new texture to graphics system
+ //IMGUI_DEBUG_LOG("UpdateTexture #%03d: WantCreate %dx%d\n", tex->UniqueID, tex->Width, tex->Height);
+ IM_ASSERT(tex->TexID == 0 && tex->BackendUserData == nullptr);
+ IM_ASSERT(tex->Format == ImTextureFormat_RGBA32);
+ const void* pixels = tex->GetPixels();
+ GLuint gl_texture_id = 0;
+
+ // Upload texture to graphics system
+ // (Bilinear sampling is required by default. Set 'io.Fonts->Flags |= ImFontAtlasFlags_NoBakedLines' or 'style.AntiAliasedLinesUseTex = false' to allow point/nearest sampling)
+ GLint last_texture;
+ GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
+ GL_CALL(glGenTextures(1, &gl_texture_id));
+ GL_CALL(glBindTexture(GL_TEXTURE_2D, gl_texture_id));
+ GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
+ GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
+ GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
+ GL_CALL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
#ifdef GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
- GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
+ GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
#endif
- GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
+ GL_CALL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tex->Width, tex->Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels));
- // Store identifier
- io.Fonts->SetTexID((ImTextureID)(intptr_t)bd->FontTexture);
+ // Store identifiers
+ tex->SetTexID((ImTextureID)(intptr_t)gl_texture_id);
+ tex->SetStatus(ImTextureStatus_OK);
- // Restore state
- GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
-
- return true;
-}
-
-void ImGui_ImplOpenGL3_DestroyFontsTexture()
-{
- ImGuiIO& io = ImGui::GetIO();
- ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
- if (bd->FontTexture)
+ // Restore state
+ GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture));
+ }
+ else if (tex->Status == ImTextureStatus_WantUpdates)
{
- glDeleteTextures(1, &bd->FontTexture);
- io.Fonts->SetTexID(0);
- bd->FontTexture = 0;
+ // Update selected blocks. We only ever write to textures regions which have never been used before!
+ // This backend choose to use tex->Updates[] but you can use tex->UpdateRect to upload a single region.
+ GLint last_texture;
+ GL_CALL(glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
+
+ GLuint gl_tex_id = (GLuint)(intptr_t)tex->TexID;
+ GL_CALL(glBindTexture(GL_TEXTURE_2D, gl_tex_id));
+#if 0// GL_UNPACK_ROW_LENGTH // Not on WebGL/ES
+ GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->Width));
+ for (ImTextureRect& r : tex->Updates)
+ GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, r.x, r.y, r.w, r.h, GL_RGBA, GL_UNSIGNED_BYTE, tex->GetPixelsAt(r.x, r.y)));
+ GL_CALL(glPixelStorei(GL_UNPACK_ROW_LENGTH, 0));
+#else
+ // GL ES doesn't have GL_UNPACK_ROW_LENGTH, so we need to (A) copy to a contiguous buffer or (B) upload line by line.
+ ImGui_ImplOpenGL3_Data* bd = ImGui_ImplOpenGL3_GetBackendData();
+ for (ImTextureRect& r : tex->Updates)
+ {
+ const int src_pitch = r.w * tex->BytesPerPixel;
+ bd->TempBuffer.resize(r.h * src_pitch);
+ char* out_p = bd->TempBuffer.Data;
+ for (int y = 0; y < r.h; y++, out_p += src_pitch)
+ memcpy(out_p, tex->GetPixelsAt(r.x, r.y + y), src_pitch);
+ IM_ASSERT(out_p == bd->TempBuffer.end());
+ GL_CALL(glTexSubImage2D(GL_TEXTURE_2D, 0, r.x, r.y, r.w, r.h, GL_RGBA, GL_UNSIGNED_BYTE, bd->TempBuffer.Data));
+ }
+#endif
+ tex->SetStatus(ImTextureStatus_OK);
+ GL_CALL(glBindTexture(GL_TEXTURE_2D, last_texture)); // Restore state
}
+ else if (tex->Status == ImTextureStatus_WantDestroy && tex->UnusedFrames > 0)
+ ImGui_ImplOpenGL3_DestroyTexture(tex);
}
// If you get an error please report on github. You may try different GL context version or GLSL version. See GL<>GLSL version table at the top of this file.
@@ -918,21 +966,24 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
GL_CALL(vert_handle = glCreateShader(GL_VERTEX_SHADER));
glShaderSource(vert_handle, 2, vertex_shader_with_version, nullptr);
glCompileShader(vert_handle);
- CheckShader(vert_handle, "vertex shader");
+ if (!CheckShader(vert_handle, "vertex shader"))
+ return false;
const GLchar* fragment_shader_with_version[2] = { bd->GlslVersionString, fragment_shader };
GLuint frag_handle;
GL_CALL(frag_handle = glCreateShader(GL_FRAGMENT_SHADER));
glShaderSource(frag_handle, 2, fragment_shader_with_version, nullptr);
glCompileShader(frag_handle);
- CheckShader(frag_handle, "fragment shader");
+ if (!CheckShader(frag_handle, "fragment shader"))
+ return false;
// Link
bd->ShaderHandle = glCreateProgram();
glAttachShader(bd->ShaderHandle, vert_handle);
glAttachShader(bd->ShaderHandle, frag_handle);
glLinkProgram(bd->ShaderHandle);
- CheckProgram(bd->ShaderHandle, "shader program");
+ if (!CheckProgram(bd->ShaderHandle, "shader program"))
+ return false;
glDetachShader(bd->ShaderHandle, vert_handle);
glDetachShader(bd->ShaderHandle, frag_handle);
@@ -949,8 +1000,6 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
glGenBuffers(1, &bd->VboHandle);
glGenBuffers(1, &bd->ElementsHandle);
- ImGui_ImplOpenGL3_CreateFontsTexture();
-
// Restore modified GL state
glBindTexture(GL_TEXTURE_2D, last_texture);
glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
@@ -970,7 +1019,11 @@ void ImGui_ImplOpenGL3_DestroyDeviceObjects()
if (bd->VboHandle) { glDeleteBuffers(1, &bd->VboHandle); bd->VboHandle = 0; }
if (bd->ElementsHandle) { glDeleteBuffers(1, &bd->ElementsHandle); bd->ElementsHandle = 0; }
if (bd->ShaderHandle) { glDeleteProgram(bd->ShaderHandle); bd->ShaderHandle = 0; }
- ImGui_ImplOpenGL3_DestroyFontsTexture();
+
+ // Destroy all textures
+ for (ImTextureData* tex : ImGui::GetPlatformIO().Textures)
+ if (tex->RefCount == 1)
+ ImGui_ImplOpenGL3_DestroyTexture(tex);
}
//-----------------------------------------------------------------------------
generated by cgit (git 2.34.1) at 2026-02-14 05:05:07 +0000